US1762801A - Projection apparatus - Google Patents

Description

June 10, 1930. H. H. STRONG 1,762,801

PROJECTION APPARATUS Filed May 14, 1927 5 Sheets-Sheet 1 Herr- 5 Strorig Hagen-toy; 3

A-ttornege June 10, 1930. H STRONG I 1,762,801

PROJECTION APPARATUS Filed May 14, 1927 5 Sheets-Sheet 2 Hart-g H. strong 7 Inve rrto r Attorneys June 10, 1930. H. H. STRONG 1,762,801

PROJECT ION APPARATUS Filed May 14, 1927 5 Sheets-Sheet 3 Ill]III]!Ill1Illlllllllllllllllllllllllll;

8 HOI'ItS H. Strong Pt I Attornegs June 10, 1930. H. H. STRONG PROJECTION APPARATUS Filed May 14,. 1927 s Sheets-Sheet 4 H Stro n3 Inventor Attorneris J n? 1930- j, H. H. STRONG 0 PROJECTION APPARATUS Filed May 14, 1927 5 Sheets-Sheet 5 Harrg Strong Attorneys Patented June 10, 1930 UNITED, STATES PATENT orrlcs HARRY n. STRONG, 0F TOLEDO, 01110, ASSIGNOR'TO THE STRONG ELECTRIC conrona TION, OF WILMINGTON, DELAWARE, A CORPORATION OF DELAWARE PROJECTION APPARATUS Application filed May 14, 1927. Serial No. 191,363.

My invention relates to projection apparatus, and particularly to lamps for projecting both motion picture and stereopticon slides, and the principal object of my inven: tion is to provide a new and improved lamp of this type. In the drawings accompanying this specification and forming a part of this application I have shown, for purposes of illustration, one form which my invention may assume, and in these drawings:

Figure l is a front end elevation of the embodiment of my invention illustrated herein showing the device in position for the projection of motion pictures,

Figure 2 is a View similar to Figure 1 showing the device in position for the .projection of stereoptican slides,

Figure 3-is a rear end elevation,

Figure 4 is a side elevation taken from the right in Figures 1 and 2, and from the left in Figure 3, 4

Figure 5 is a horizontal section taken 0 the line 5-5 of Figure 4,

Figure 6 is a section taken on the line 6-6 of Figure 4, showing particularly the front carbon holder and the interior ofthe nose, and showing the nose in motion picture projecting position,

Figure 7 is a View similar to Figure 6 but showing the nose in stcreopticon projecting position,

Figure 8 is a. view similar to Figure 4 on'litting parts to show more clearly the front carbon supporting and operating means, and the carbon operating mechanism,

Figure 9 isa fragmentary sectionvon the line 99 of Figure 4 showing the rear carbon support,

Figure 10 is a fragmentary section on the line 10-10 of Figure 9 showing the connection between the rear carbon holder and the supporting f1 ame therefor,

Figure '11 is a View similar to Figure 4 omitting parts to show more clearly the rear carbon operating and adj usting mechanism, and thecarbon operating mechanism,

Figure 12 is a detail showing the connection between the hand andmotordrives for the carbon operating mechanism,

Figure 13 is a sectionon the line 13-13 showing the reflector and reflector support, Figure 14 is a section on the line 14'14 of Figure'13, I

Figure 15 is a fragmentary view similar to Figure '4 omitting parts to show more clearly the reflector support. and adjustment, showing the reflector in the position for motion picture projection,

Figure 16 is a fragmentary View similar to Figure 15 but showing the parts in the position for stereopticon projection, while Figure 17 is a detail showing the means for adjusting the throw of the reflector between motion picture projecting' position' and stereopticon projecting position.

The lamp'herein shown is enclosed in a housing 21 comprising front and rear end plates 22 and 23 provided with flanges 24 and 25 and united by suitable tierods 26 and 27 a top 28-extending between the front and rear end plates 22 and 23 secured to the flanges 24 and 25 and further uniting the front and rear. end plates 22 and 23, side bases 29 also extending between the front and rear end plates 22 and 23 secured to the flanges 24 and 25 and further uniting the front and rear end plates 22 and 23, doors 30 pivoted onthe tierods 27 and normally closing the space on the housing 21 between the lower edge of the top 28 and the upper edge of the-"corresponding side base 29, and a pair of carrier rods 31 and 32 secured to thefront and rear end plates 22 and 23, additionally uniting the front and rear end plates 22 and 23, and recipro cably supporting a front carbon holderassem'bly 33, a rear carbon holder assembly 34, and a reflector assembly 35.

Pivoted to theend of the carrier rod 31 forwardly of the front end plate 22 is a nose 36 over1ying the projection aperture 37 in the front end plate 22, provided with a motion picture projection aperture 38 containing ailens 39 and adapted to be closed by means of a plate 40 pivoted to the 'nose 36 at 41 and operable by means of a handle 42, provided also with a pair of apertures 43 for stereopticon projection each having alinecl therewith a suitable slide holder 44 and each adapted to be closed by means of a plate 45 secured to a shaft' 46 iv-' the carrier rod 31, and by means of a suits I able handle 49, between the position shown in Figure 1 wherein the motion picture roject'ing aperture 38 isalined with the ont end late aperture 37 and the position shown in. igure 2 wherein the stereopticon pro- 'ecting apertures 43 are alined with the ont end plate aperture 37. V

The front carbon holder assembly 33 comprises a base provided at one side with an ear 51 encircling the carried rod 32, and at the other 'side with a fork 52 embracing the carrier rod 31, and carries secured there-. to by suitable machine screws 53 a plate 54 from which rises a carbon supporting post 55 provided with a recess 56 in which the front carbon 57 is held firmly clamped in .position by means of a strap 58 secured intermediate its end by means of a maehine screw. 59 to the carbon supporting post 55 and acting to clamp the carbon 57 by movement of its upper end 60 toward the carbon supporting post 55 and the carbon 57 as its lower end 6lfiis forced away from the carbon supporting post 55 by the action of the tip 62 of a pin 63 screw-threadedly en gaging within a cooperatingly screwthreaded tube 64 carried by the plate 54, positioned with its tip 62 bearing against the lower end 61 of the strap 58, and operated by means of a conveniently positioned handle 171.

' The rear carbon holder assembly 34 comprises a substantially square frame 65 provided at one lower corner with an ear 66 encircling the carrier rod 32, and at the other lower corner with a fork 67 embracing the carrier rod 31, provided intermediate its lower side 68 with a downwardly depending lug 69, and intermediate its upper side 70 with a segmental spherical recess 71 receiving and supporting for universal movement a cooperating segmental sphere 72 seated within the segmental spherical recess 71 and provided centrally with an aperture 73 in which is mounted an insulating sleeve 74 surrounding a rear carbon holder base 75 carrying projecting from the forward end thereof carbon gripping fingers 76 and 77 effective to support between them the rear carbon 78.

. The segmental sphere72 is held in position seated in the segmental spherical recess 71, and the segmental sphere 72 and rear carbon 78 are angularly adjusted relative to the frame 65 to aline the rear carbon: 78 with the front carbon 57, by two separate and independent adjusting means operating together to secure the segmental sphere 72 a substantially horizontal axis, and the two therefore operating to provide a universal adjustment of-the'rea'r carbon 78 to permit movement of the rear carbon 78 in any direction.

The mechanism for adjusting the-carbon holding segmental sphere 72 about the substantially vertical axis comprises an arm 79 extending laterally from the segmental sphere 72, a tension spring 80 extending between the end of the arm 79 and the adjacent upper corner 81 of the fraine 65, an arm 82 extending laterally from the segmental sphere 72 in the opposite direction from the arm 79 and provided at its end with a slot 83, and an; adjusting rod 84 provided at its end with a section 85 screw-threaded to cooperate with a correspondingly screw- .threaded aperture 86 in thevupper corner 87 of the'frame 65, provided with a reduced section 88 received Within the slot 83 in the arm 82, reciprocable through a suitable aperture' in the rear end plate 23 to permit reciprocation of the rear carbon holder assembly 34 along the carrier rods 31 and 32, provided at its rear end with an operating handle 89, and effective to draw the arm 82 toward the frame 65 against the action of the tension spring 80 until the rear carbon 78 has assumed the desired lateral position;

while the mechanism for adjusting the segmental sphere 72 about the substantiallyhorizontal axis comprises an arm 90 extending upwardly from the segmentalsphere 72, an arm 91 extending upwardly from the upper side 70 of the frame 65, a tension spring 92 extending between the arm 90 and the arm 91,

an arm 93 extending downwardly from thesegmental sphere 72 and provided at its lower end with a slot 94, and a rod 95 provided at its end with a screw-threaded section 96 adapted to engage a cooperating screw-threaded aperture 97 in the arm 69 projecting downwardly from the lower side of the frame 65, provided with a reduced extension 98 received within the slot 94 of the arm 93, reciprocable through a suitable aperture in the rear end plate 23 to permit reciprocation of the rear carbon assembly 34, provided at its rear end with an operating mounted in the front and rear end plates 22 and 23,.prmjded' over its forward portion 104 engaging within a vcooperatingly' 5 screw-threaded aperture 105 formed in an arm 106 extending downwardly and rearwardly from the base 50 of the front carbon holder assembly 33, directly operable-by means of a handle 108 secured to an extension 109 projecting rearwardly of the rear end plate 23, and in'iposit-ively operable by means of an electric motor 110 connected to the screw unit 100 by an intei'nte'diate shaft 111 which is driven from the motor 110 by.

a worm 112 carried on the motor shaft 113 engaginga cooperating worm gear 114 carried onthe upper end of the intermediate shaft 111, and which drives through a worm 115 carried on the lower end of theintermediate shaft 111 engaging afcooperating .worm gear 116 rotatable on the extension 109 of the screw unit 100 but held in frictional engagement with the end of the righthand-screw section 104- of the screw unit 100 by means of a spring 117 compressed" between the handle 108 and t-he outer face of the-rear end plate 23 and tending to' clamp the worm gear 116 between the righthand-screw 'portion 104 and a ball-bearing unit 118 interposed between the worm gear 116 and the inner face of the rear end plate 23 to eliminate friction between the worm gear 116 and the rear end plate 23.

It will be understood by those skilled in the art that the handle108 will ordinarilybe used in striking and adjusting the arc, and that thereafter the motor 110 controlled in any suitable manner, will operate tomaintain the arc in. proper adjustment.

The reflector assembly 35 comprises a substantially square frame 119 provided at one lowercorner with an ear 120 encircling the carrier rod 31, and at the other lower corner with a fork 121 embracing the carrier rod 32, and provided intermediate its upper side 122 with a segmental spherical recess 123 supporting a cooperating segmental sphere 124 universally movable within the segmental spherical. recess 123, provided centrally with an aperture 125 for the free passage of the rear carbon 78, and carrying, by means of a spider 126, and fingers 127, a reflector 128 provided with a central aperture 129 for the passage of the rear carbon 7 8, held in position against the overhanging ends 130 of the fingers 127 by meansof a spring holding finger 131 secured to the spider 126 engaging the rearface of the reflector 128 and acting to move the reflector 128 forward against the overhanging ends 130 of the fingers 127, adapted in one position relative to the are between the front and rear carbons '57 and 7 8 to focus the light from the arc onto the lens 39 carried in the aperture 38 of the nose 36, and adapted in'another positlon relative to the arc to reflect the light from the arc asa parallel beam. illuminating the stereoptican projecting tapertures 43 of the nose 36. I a The segmental sphere 124 is held in position within the segmental spherical recess 123, and the segmental sphere 124 and the reflector 128 are adjusted universally relative to the reflector frame 119, by means of two separate andindependent adjusting means together effective to hold the seg- 'mental sphere 124 seated within the segmental spherical recess 123, operating one to adjust the reflector 128 about asubstantially vertical axis and the other to adjust the reflector 128 about a substantially horizontal axis, and the twoserving to provide conjointly'universal adjustment of the reflector 128 upon the reflector assembly frame 119. v

The mechanism for adjusting the reflector 128 about the substantially vertical axis comprises a tension spring 132 extending between the upper corner 133 of the frame 119 and the adjacent arm 134 of the'spider 126,

and a rod 135 providedwith a screw-threaded section 136 engaging within a cooperatingly screw-threaded. aperture 137 formed in the upper corner 138 of the frame 119, provided with a reduced extension 139 extending through a slot 140 in the adjacent arm 141 of the spider 126. and terminating in a head 142 overlying the forward face of the spider arm 141 adjacent the slot 140, reciprocable through a suitable' aperture in the rear end frame 23 to permit adjusting reciprocation of the reflector assembly 35,

operable by means of a handle 143 disposed rearwardly of the rear end plate 23, and eflective to draw the arm 141 of the'spider 126 toward the upper corner 138 of the frame 119 against the action of the tension spring 132 to thus swing the reflector 128 about a substantially vertic'alaxis until it has assumed the desired lateral position; while the mechanism for adjusting the reflector 128 about the substantially horizontal axis comprises a tension spring 144 extending between the lowest portion of the rim 145 of the spider 126 and the center of the lower cross bar 146 of'the frame 119, an arm 147 extending upwardly from the central por-- tion of the upper cross bar 122 of the frame 119, and a rod 148 provided with a screw threaded section 149 engaging within a cooperatingly screw-threaded aperture 150 formed in the end of the arm 147, provided with a reduced extension 151 extending through a slot 152 in an arm 153 of the spider 126 andterminating in an-e-nlarged head 154 overlying the inner face ofthe spider arm 153 adjacent the slot 152, reciprocable through a suitable aperture in the rear end plate 123 to permit adjusting reciprocation of the reflector 128, provided at its rear end with an operating handle 155, and effective to draw the arm 153 of the spider 126 toward the arm 147 of the frame 119 to thus swing the reflector 128 upwardly'against the action of the tension spring'le A until the reflector 128 has assumed the desired vertical position. 1 V

The reflector 128 is adjusted along the carrier rods 31 and 32 to properly focus the light upon the lens 39 by means of a eon trol rod 156 rotatably and reciprocably mounted inthe front and rear end plates 22 and 23, provided with a screw-threaded extension 157 projecting forwardly of the front end plate 22, provided with a rear extension 158 extending rearwardly of the rear end plate 23, provided adjacent the inner face of the rear end plate.23 with a collar 159 limiting the rearward reciprocation of the control rod 156, provided on the end of the rearextension 158 with an operating handle 160, normally held in extreme rearward reciprocated osition by means of a spring 161 encircling t erear extension 158 compressed between the operating. handle 160'and the outer face of the rear end plate 23 and effective to maintain the collar 159 in tight engagement with the inner face of the rear end plate 23, provided with a screw-threaded section 162 engaging a cooperatingly screwthreaded aperture 163 in an arm 16 1 extending downwardly and rearwardly from the frame 119 of the reflector assembly 35, and operable to adjust the reflector 128 by reciprocation of the frame 119 and reflector 128 produced by rotation of the control rod 156 through the coaction of the screwthreaded section 162 of the rod 156 and the cooperatingly screw-threaded aperture 163 in the arm 164 of the reflector assembly 35.

This adjustment of the reflector 128 provides the adjustment necessary to focus the light beam upon the lens 39, and could provide the adjustment necessary to transform the light beam from a beam focused on the lens- 39 for motion "picture projection to a parallel beam falling on the apertures 43 and 44 for stereopticon projection. Such an arran ement, however, would require not only pro onged effort to move the reflector 128 from its focusing beam position to its pgrallel beam position but in addition care- 1 adjustment of the reflector 128 upon such movement'into either of these positions.

The embodiment of my invention herein shown provides means eliminating these difficulties, this means being herein shown as a roller 165 rotatably mounted upon a bracket 166 depending from the lower. edge of the nose 36, swinging with the nose .36,

and efi'ective, when the nose 36 is moved into stereopticon projecting position, as shown in Figures 2 and 7, to advance the reflector 128, from the beam focusing motion picture projecting position shown in Figures 1 and 6 and 15 to the parallel beam stereopticon projectin positionshown in Figures 2 and 7 and 16, y reciprocation of the control rod 156 against the action of the compressed spring 161 eflected by engagement of the roller 165 beneath a cone 167 provided with under the particular projection conditions under which the lamp may be operating, and held in adjusted position by means of a lock screw 170 insertable within the screwthreaded aperture 168 of the cone 167 into binding and locking engagement with the end of the extension 157 of the control 156.

It will of course be understood that upon retraction of the nose 36 into motion picture projecting position the control rod 156 and the reflector 128 will be returned by the spring 161 exactly to beam focusing motion picture projection positionwithout further adjustment.

From the above description it will be obvious to those skilled in the art that I have provided a lamp for the projection of mo- At the same time it also will I be obvious to those skilled in the art that the particular embodiment of ,my invention herein shown and disclosed embodies advantages other than those particularly pointed out or suggested herein, and also that; this particular embodiment of my invention may be variously changed and modified without sacrificing these advantages or departing from the spirit of my invention, and it therefore will be understood that the disclosure herein is illustrative only, and that my invention is not limited thereto.

I claim:

1. Projection apparatus comprising: a housing; movable light-beam-producing mechanism disposed within said housing, comprising light-producing means, comprising also movable reflector means cooperating with said light-producing means to produce a light beam, and variable by approach and recession of said reflector means toward and from said light-producing means to vary the focus of said 'light beam; movable nose mechanism connected to said housmg, provided with a pair of openings for the pasg sage of light therethrough, and movable be-- tween a position in which one of said openings is in operative relation 'to said lightv beam and a position in which the other of said openings is inoperative relation to said light beam; and means whereby sueh movement of said nose mechanism automatically efi'ects such movement of said light-beamproducin mechanism.

2. Pro ection apparatus compr1sm": a housing; and movable light-beam-producing mechanism disposed within said housing, comprising light-producing means, comprising also reflector means cooperating with said light-producing means to produce a light beam, saidlight-producing means and said-reflector means being relatively movable toward and from each other, and'said light-beam-producing mechanism being variable by relative approach and recession of said light-producing means and said reflector means to vary the focus of said light beam between a beam suitable for cinematographic projection and a beam suitable for) light beam, said light-producing means and said reflector means being relatively movable "toward'and from each other, and said light- -beam-produc1ng mechamsm being variable by relativefapproach and recession of said light-producing means and said reflector means to vary the vfocus of said light-beam between a beam suitable for cinematographic projection and a beam suitable for stereopticon' projection; and means to vary the relative position of said reflector means and said light-producing means by a fixed amount adjustable to correspond to projection conditions. v

4. Projection apparatus comprising: a housing; and movable light-beam-producing mechanism disposed within said housing, comprising light-producing means, comprising also reflector means cooperating with said light-producing means to produce a light beam and movable toward and from said light-producing means, and variable by approach and recession of said reflector means toward and from said 1i ht-producing means to vary the focus 0 said light beam between a beam suitable for cinematographic projection and a beam suitable for stereopticon projection.

5. Projection apparatus comprising: a housing; movable llght-beam-producmg mechani snidisposed within said housing,

comprising light-producing means, comprismg also reflector means cooperating with said light-producing means to produce a light beam and movable toward and from said light-producing means, and variable by approach and recession of said reflector means toward and from said light-producing means to vary the focus of said light beam' between a beam suitable for cinematographic projec tion and a beam suitable for stereopticon projection; and means'to effect a fixed movement of said reflector meanslight beam, said light-producing means and 7 said reflector means being relatively 'mov-' able toward and fromeach other, and saidlight-beam-producing means being variable by relative approach and recession of said light-producing means and said reflector means to vary the focus of said light beam between a beam. suitable for cinematograp'hic projection and a beam suitable for" stereopticon projection; and movable nose mechanism connected to said housing, provided with a first opening for the passage of light therethrough for cinematographic projection and with a pair of openings for the passage of light there-' through for stereopticon projection, and

movable between a position in which said first opening is inoperative relation to said light beam and a position in which said pair of openings are in operative relation to said'light beam. 7

7. Projection apparatus comprising: a housing; movable light-beam-producing mechanism disposed within said housing,

comprising light-producing means, comprising also. reflector means cooperatmg with said light-'produclng means to produce a light beam, said light-producing means and said reflector means being relatively movable toward and fromeach other, and said hght-beam-producmg mechanism being variable by relative approach and recession ofsaid light-producing means and said reflector means to vary the focus of said light beam between a beam suitable for cinematographic pro ection and a beam suitable for stereoptlcon pro ectlon; movable nose mechanism[connectedto said housing, provlded with a first opening for the passage of light thercthrough for cinematographic projection and With-a pair of-openings for the passage of light therethrough for stereopticon projection, and movable between a 1 position in which said first opening is in operativerelation to said light beam and a )osition iniwhich said pair of openings are in operative relation to said light beam; and

means for' effecting a fixed relative movement ofsaid light-producing means and said reflector means variable to correspond to projection conditions.

8. Projection apparatus comprising: a housing; 7 movable light-beam-producing mechanism disposed within said housing, comprising li ht-producing means, comprising also re ector means cooperatin with said light-producing means to pro uce a lignt beam and movable toward and from i for stereoptico projection, and movable between a positi n in which said first open-m ing is in operative relation to said light beam and a position in which said pair of openings are in operative relation to said light beanf 9. Projection apparatus comprising: a: housing; movablev light-beam-producing mechanism disposed within said housing,

1 comprising light-producing means, comprising also reflector means cooperating with said light-producing means to produce a light beam and'movable toward and from said light-producing means, and variable by apa proach and recession of said reflector meanstoward and from said light-producing means to vary the focus of said light beam between a beam suitable for cinematographic projection and a beam suitablefor stereopticon projection; movable nose mechanism connected to said housing, provided with a first opening for the passage of light therethrough for cinematographic projection and with a pair of openings for the passage of light therethrough for stereopticon projection, and movable between a position in which said first opening is in operative relation to said light beam and a position in which said pair of openings are inoperative relation vto said light beam; and means for efiecting a fixed movement of said reflector 1 means variable to correspond to projection conditions.

10. Projection apparatus comprising: a

housing; movable light-beam-producing mechanism disposed within said housing,

comprising light-producing means, comprisriable b .ing also reflector means cooperatin in also reflector means cooperatin with said light-producing means to pro uce a light beam, and light-producing means and said reflector means. being relatively movable toward and fromeach other, and said light-be'am-producing mechanism being varelative approach and recession 0 said light-producing means and said reflector means to vary the focus of said light beam; movable nose mechanism connected to said housing, provided with a pair of openings for the passage of light therethrough, and movable between a position in which one of said openings is in operative relation to said light beam and a position in which the. other of said openingsis in operative relation to said light beam;

and means whereby such movement "of one of said mechanisms will automatically beaccompanied by such movement of the other of said mechanisms.

11. Projection apparatus comprising: a

housing; movable mechanism disposed within said housing, comprising light-producing means, compriswith said light-producing means to pro uce a light beam and movable toward and from said light-producing means, and variable by approach and recession of said reflector means toward and from said li ht-producing means to vary the focus 0 said light beam; movable nose mechanism connected to 1 said housing, provided with a pair ofopen- ,ings for the'passage of light therethrough, and movable between a position in which one of said openings is in operative relation to said light beam and a position in which the other of said openings is in operative relation to said light beam; and means ,whereby such movement of one of said mechanisms will automatically be accompanied by such movement of the other of said mechanisms.

12. Projection apparatus comprising: a housing; inovable light-beam-producing mechanism disposed within said housing,-

comprising light-producing means, comprisin also reflector means cooperatin with said light-producing means to pro uce a light beam, said light-producing means and said reflector means being relatively movable toward and from each other, and said lightbeam-producing mechanism being variable by relative approach and recession of said light-producing means and said reflector means to vary "the focus of saidlight beam;

light-beam-producing movable nose mechanism connected to said I housing, provided with a pair of openings for the passage of light therethrough, and

movable between a position in which one of said openings is in operative relation .to said light beam and aposition in which the other of said openingsis in operative relation to said light beam; and means whereby such movement of one of said mechanisms automatic'ally effects such movement'of the other ing also reflector means cooperating withsaid light-producing means to produce a light beam and movable toward and from said light-producing means, and variable by approach and recession of said reflector means'toward and from said light-producing means to vary the focus of said light beam; movable nose mechanism connected to said housing, provided with a 'pair of openings for the passage of vlight therethrough, and movable between a position in which one of said openings is in operative relation to said light beam and a position in which the other of said openings is in operative relation to said light beam; and means whereby such movement of one of said mechanisms automatically effects such movement of the other of said mechanisms.

14. Projecting apparatus comprising: a housing; movable light-beam-producing mechanism disposed within said housing,

comprising light-producing means, comprising also reflector means cooperatiiig with said lIght-PIOdUCIIIg IIIBEIDS to produce a light beam, said light-producing means and said reflector means being relatively movable toward and from each other, and said light-beam-producing mechanism being variable by relative approach and recession of said light-producing means and said reflector means to vary the focus of said light beam; movable nose mechanism connected to said housing, provided with a pair of openings for the passage of light therea through, and movable between a position in which one of said openings is in operative relation to said light beam and a position in which the other of said openings is in operative relation to said light beam; and means whereby such movement of said nose mechanism automatically effects such movement of said light beam producing mechanisnr.

15. Projection apparatus comprising: a housing; movable light-beam-producing mechanism disposed within said housing, comprising light-producing means, comprising also reflector means cooperating with said light-producing means to produce a light beam, said light-producing means and said reflector means being relatively movable toward and from each other, and said lightbeam-producing mechanism being variable by relative approach and recession-of said light-producing means and said reflector means to vary the focus of said light beam between a beam suitable for cinematographic projecton and a beam suitable forstereopticon projection; movable nose vmechanism connected tols aid housing, prov1ded with a first opening for the 'passage of light therethrough for cinematographic projection and with a second opening for the passage of light therethrough forv stereopticon projection, and movable between a position, in which one of said openings is in operative relation to said light beam and a position in which the other of said openings isin operative relation to said light beam; and means whereby such movement of one of the said mechanisms will automatically be accompanied by such movementof the other of said mechanisms.

'16, Projection apparatus comprising: a housing; movable light-beam-producing mechanism disposed within said housing, comprising light-producing means, comprising also reflector means cooperating with said light-producing means to produce a through for cinematographic projection and Y with a second opening for the passage of light therethrough for stereopt-icon projection, and movable between a position in' which one of said openings is in operative relation to said light beam and a position in which the other of said openings is in operative relation to said. light beam; and means whereby such movement of one of said mechanisms will automatically be accompanied bysuch movement of the other ofsaid mechanisms.

17 Projection apparatus comprising: a

housing; movable light-beam-producing mechanism disposed within said housing, comprising light-producing means, comprising also reflector means cooperating with-said light-producing means to produce a light beam, said light-producing means and said reflector means being relatively movable toward and from each other, and said lightbeam-producing mechanism being variable by relative approach and recession of said light-producing means and said reflector means to vary the focus of said light beam between a beam suitable for-cinematograph- -ic projection and a beam suitable for stereopticon projection; movable nose mechanism connected to said housing, provided with a first opening for the passage of light therethrough for cinematographic PI'OjGC', tion and with a pair of openings for the passin which'said first opening is in operative' relation to said light beam and a position in which-said pair of openings are inoperative relation to said light beam; and means I v whereby such movement of one of said mechanisms will automatically be accompanied by such movement of the other of said mech anisms;

18. Projection apparatus comprising: a

" housing; movable light-beam-producing mechanism disposed within said housing,- comprising light-producing means, comprising also reflector, means cooperatin with said light-producing means to pro uce a lightbeam and movable toward and from said light-producing means, and variable by approach and recession of said reflector means toward and from said light-producing means to vary the focus of said light 1 beam between a beam suitable for cinematographic projection and a beam suitable for stereopticon projection; movable nose mech-, anism connected to said housing, provided with a first opening for the passage of light therethrough for cinematographic pro ection and with a pair of openings for'the ,passage of light therethrough for stereopticon projection, and movable between a position in which said first opening is in Opera tive relation to said light beam and a position in which saidpair of openings are in operative relation to said light beam; and means whereby such movement of one of said mechanisms will automatically be accompanied by such movem nt of the other .of said mechanisms.

19. Projection apparat fmprising: a'

housing; and lightbeam producing. mechanism disposed within said h'ousijng and in= I 40 eluding light-producing'me'ans and reflector means cooperating with said light-producil-ig means to produce a light beam suitablefor cinematographic projection, said reflector means being so mounted as to permit operative positioning of at least a part thereof to vary said 'light-beam-prOducing means to produce a light beam of different focus and suitable for stereopticon projection.

20. Projection apparatus comprising: a

i housing, and light-beam-p'roducing mechamsm disposed within said housing and ineluding light-producing means and reflector" means cooperating with said light-producing means to produce a light beam suitable for cinematographic projection, said light-pro ducing means and said reflector means being so mountedas to permit operative relative positioning thereof to vary said light-beamproducing means to produce a light beam 50 of diflerent focus and suitable for stereopticon projection.

In testimony whereof I hereunto affixmy signature. I HARRY H; STRONG.

Images